| With the development of science and technology,all kinds of excellent building materials have been developed gradually.Steel fiber reinforced concrete,as a new composite combining concrete with steel fiber,can effectively solve many difficulties in engineering.Because of its own advantages,it has a broad prospect in application.Another reinforcement concrete structure is reinforced using rebar.The tensile strength and bending strength of reinforced concrete are obviously improved.The finite element method and experiment are used to study the mechanical performance of steel fiber reinforced concrete in this paper.1)The Finite element model of steel fiber reinforced concrete structure and rebar reinforced concrete structure were formulated respectively.Comparison of the two structures under different load,the steel fiber reinforced concrete structure has better mechanical performance.2)Four kinds of fiber latticed structures were designed used in the concrete.The included angle between the fibers is 30°,45°,60°,90°,respectively.The finite element method and experiment were used to study the mechanical performance of the fiber lattice reinforced concrete.The results show that effective working length of fibers along the direction of tensile stress increases with the decreasing of included angle of steel fiber latticed structure,which is advantage to retard the flexural specimen’s crack growth.It means that the loading capacity of the steel fiber reinforced concrete structure is improved.3)Adjusting the position of the steel fiber lattice in the concrete,the distance from the bottom of the concrete beam is 0.5 cm,1.0 cm,1.5 cm,respectively.The finite element method and experiment were used to study the mechanical performance of the fiber lattice reinforced concrete.The results show that optimized design for the thickness of protective layer of the steel fiber reinforced concrete structure is advantage to the bearing capacity of the structure. |
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